The excessive and uncontrollable spurt of information out of a medical student. May or may not be related to the conversation (usually not).

Symptoms are exacerbated by the presence of a professor or other figure of authority.

Average Student1: Did you watch the game last night?

Gunner: "No, I was studyi... *professor comes in* Cell-derived mediators are normally sequestered in intracellular granules and can be rapidly secreted by granule exocytosis or are synthesized de novo in response to a stimulus."